expando Property

 

Gets or sets a value indicating whether arbitrary variables can be created within the object.

 

1、语法：

 


object.expando

 

2、可能的值

  • true   ----默认值 Creation of arbitrary variables is allowed.(创建任意的变量是允许的)
  • false  ----Creation of arbitrary variables is not allowed.

 

 

 

<html>
<head>
<script type="text/javascript">
    //Set the expando property to false.
    document.expando = false;
</script>
</head>
<body>
<div>
    <span id="test" unselectable="on">This text should be selectable.</span>
</div>
</body>
</html>

 

 

扩展阅读：

 

1、http://technet.microsoft.com/zh-cn/library/ms533747(en-us,VS.85).aspx